Key type common control telephone switching system



Sept. 6, 1966 E. ALLEN mmm 32H52@ KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM (55 Sheets-Sheet l Filed Sept. 27, 1961 TT'ORNE V Seph, i966 T. E. ALLEN TAL KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM 55 Sheets-Sheet 2 Filed Sept. 27, 1951 35 Sheets-Sheet 5 mmmmml HHH! T- E. ALLEN ETAM...

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KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM Filed Sept. 27, 1961 Sept. 6, 1966 T. E. ALLEN ETAL KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM 55 Sheecs--Shee'fl 5 Filed Sept. 27, 1961 3mi @M228 mwou NS.

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KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM 55 Sheets-Sheet 6 Filed Sept. 27, 1961 Samoa N ...Sk

Sept. 6, 1966 T. E. ALLEN ETAL KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM Filed Sept. 27, 1961 53 Sheets-Sheet '7 Sept. 6, 196.6" T. E. ALLEN r-:T-AL.

KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM Filed Sept. 27, 1961 55 Sheets-Sheet 8 Q m QQ v #El Sept. 6, 1966 T. E. ALLEN ETAL KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM 53 Sheets-Sheet 9 Filed Sept. 2'7, 1961 m. @Px

Sept. 6, 1966 T, E, ALLEN ETAL 3,271,524

KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM Filed Sept. 27, 1961 53 SheetS-Sheet 10 SePf- 5, 1966 T. E. ALLEN ETAL 3,271,524

KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM Filed Sept. 27, 1961 53 Sheets-Sheet 1l Sept. 6, 1966 T. E. ALLEN ETAL KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM 55 Sheets-Sheet l 2 Filed Sept. 27, 1961 N .ubi

KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM 55 Sheeis-Sheet 13 Filed Sept. 27, 1961 Sept. 6, 1966 r. E. ALLEN ETAL KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM 55 Sheets-Sheet 14 Filed Sept. 27, 1961 KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM 55 Sheets-Sheet 1 5 Filed Sept. 2'7, 1961 Sept. 6, 1966 T. E. ALLEN ErAl.

KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM Filed Sept. 27, 1961 35 Sheets-Sheet 16 Sept. 6, 1966 T. E. ALLEN ETAL. 3,271,524

KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM Filed Sept. 27, 1961. 55 Sheets-Sheet 17 Sept. 6, 1966 T. E. ALLEN ETAL 3,271,524

KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM Filed Sept. 27, 1961 53 Sheets-Sheet 18 POS/T/O/V 40 FIG. /4

Sept. '6, 1966 T. E. ALLEN ETAL 3,271,524

KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM Filed Sept. 27, 1961 55 Sheets-Sheet 19 POSITION 40 /CT ,Dc/12@ RR A J Sept. 6, 1966 T. E. ALLEN ETAI.

KEY TYPE COMMON CONTROL TELEPHONE SWITCHING SYSTEM 55 Sheets-Sheet 20 Filed Sept. 27, 1961 m. Qi 

1. A SWITCHING SYSTEM COMPRISING, SUBSCRIBER STATIONS, AN ATTENDANT POSITION, A PLURALITY OF MANUALLY OPERABLE KEYS AT SAID POSITION EACH OF WHICH IS INDIVIDUALLY ASSOCIATED WITH ONE OF SAID STATIONS, AND COMMON CONTROL SWITCHING FACILITIES RESPONSIVE TO THE OPERATION OF A SELECTED ONE OF SAID KEYS TO ALTERNATIVELY COMPLETE INCOMING AND OUTGOING CONNECTIONS BETWEEN SAID POSITION AND THE SUBSCRIBER STATION ASSOCIATED WITH SAID SELECTED KEY. 